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Star rating calculator: your average from 5 to 1 stars
Enter how many 5, 4, 3, 2 and 1-star reviews you have. See your exact average, the rating Google would show, and how many 5-star reviews the next tenth of a star takes.
Your average rating
Your 85 reviews add up to 376 stars, an average of 4.42. Google shows one decimal, so expect to see about 4.4★ on your profile.
13 more 5-star reviews would lift your average to 4.5.
One more 1-star review would take you to 4.38.
Your breakdown
Every review counts the same here. Google doesn't publish its exact method, so treat the one-decimal figure as a close estimate.
Next step: how many 5-star reviews it takes to reach the rating you want
How the average is worked out
A star rating is a plain average. Multiply each star level by the number of reviews at that level, add the results together, and divide by the total number of reviews:
rating = (5 × a + 4 × b + 3 × c + 2 × d + 1 × e) ÷ (a + b + c + d + e)
Take the example the calculator opens with: 5 × 62 + 4 × 11 + 3 × 4 + 2 × 2 + 1 × 6 = 376 stars across 85 reviews. 376 ÷ 85 = 4.42, which Google would show as about 4.4.
Lifting that to 4.5 takes 13more 5-star reviews. Each one adds 5 stars and 1 review, so it pulls the average toward 5.0, a little less with every step. That's why the last tenths before 5.0 are the slowest to earn. If you know your target and want the number of reviews it takes, the Google review calculator works it out from your current rating and review count.
Low ratings weigh more than people expect. In the example, the 6 one-star reviews cost the business more than the 11 four-star reviews: each 1-star sits 4 stars below a perfect score, each 4-star only 1. One more 1-star review would take the average to 4.38.
Google shows your rating to one decimal and doesn't publish its exact method, so treat the one-decimal figure as a close estimate. The maths is the same on any site with 1-to-5 star ratings.
Every review deserves an answer.
ReplyChamp doesn't change your rating. It drafts a reply to each new Google review in your voice, so people reading your reviews see an owner who pays attention. Sensitive reviews always wait for your approval, and nothing posts unless you let it.
First 10 replies free · No credit card
Star rating questions, answered
How do you calculate a 5-star rating?
Multiply each star level by how many reviews it has, add those up, and divide by the total number of reviews. For example, 8 five-star reviews and 2 one-star reviews make 8 × 5 + 2 × 1 = 42 stars across 10 reviews, an average of 4.2.
Is this how Google calculates my rating?
It’s the simplest model and very close to what you’ll see. Google shows your rating with one decimal and doesn’t publish its exact method, so the number on your profile can differ from this average by a tenth now and then.
Where do I find how many reviews I have at each star level?
Your Business Profile’s review list shows every review with its stars, so you can count them there. If you only know your overall rating and total number of reviews, use our Google review calculator instead: it works from those two numbers.
Why does my rating barely move after a new review?
Each review is one vote out of all of them. With 10 reviews, one new review moves your average a lot. With 300, it barely shifts it. The more reviews you have, the steadier your rating gets, in both directions.
What is a good Google star rating?
There’s no official cut-off, but most owners aim for somewhere in the mid-4s with a healthy number of recent reviews. A 4.6 with 200 reviews usually reads as more believable than a perfect 5.0 with 6.
Does this work for Yelp, Facebook or Amazon ratings?
The maths does: any 1-to-5 star average is total stars divided by the number of reviews. Each site has its own display rules and filters, though, so the number it shows may not match exactly.
Is this calculator free, and do you save my numbers?
It’s free, with no sign-up. The maths runs in your browser, so the numbers you type aren’t sent to us or saved anywhere.
Want more reviews to work with? See how to get more Google reviews, and how to respond to negative Google reviews for the ones that sting.